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Polymeric Polyol Esters Used in Metalworking Fluids

a technology of polyol esters and metalworking fluids, applied in the direction of liquid carbonaceous fuels, lubricant compositions, fuels, etc., to achieve the effects of enhancing solubility, reducing acid numbers, and improving solubility characteristics

Active Publication Date: 2007-12-13
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]Further, polymeric polyol esters with improved solubility characteristics and lower acid numbers can be prepared using a portion of a trihydric alcohol like trimethylolpropane to replace a portion or all of the of pentaerythritol in a polymeric polyol ester used as a lubricant additive for metalworking. Incorporation of trimethylolpropane as a partial or complete replacement for pentaerythritol in a polymeric polyol ester results in enhanced solubility.
[0014]Another benefit of partial or complete replacement of pentaerythritol is that lower acid numbers are obtained in these particular polymer formulations when trimethylolpropane is part or all of the total polyol charge. Typically in polyol esters of this type made with pentaerythritol as the sole polyol, the acid numbers are about 20 mgKOH / g of additive. When trimethylolpropane replaces about 50 mole percent of the pentaerythritol under the same reaction conditions, the acid number can readily be reduced to less than 8 mgKOH / g and more desirably less than 5 mgKOH / g. When trimethylolpropane replaces all of the polyol, the acid number can go below 5 mgKOH / g and more desirably less than 3 mgKOH / g. Higher acid numbers are undesirable to the extent that they promote coupling of polymer chains, which can significantly reduce the solubility of polymeric polyol esters in hydrocarbon oils.

Problems solved by technology

Higher acid numbers are undesirable to the extent that they promote coupling of polymer chains, which can significantly reduce the solubility of polymeric polyol esters in hydrocarbon oils.

Method used

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  • Polymeric Polyol Esters Used in Metalworking Fluids
  • Polymeric Polyol Esters Used in Metalworking Fluids
  • Polymeric Polyol Esters Used in Metalworking Fluids

Examples

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specific embodiment

[0032]The following example(s) demonstrate the present invention:

Example of Polymeric Polyol Ester

[0033]A glass reactor equipped with a stirrer, thermometer, nitrogen inlet and water-trap connected to a condenser was charged with about 8.0 equivalents coconut fatty acid, about 2.4 equivalents 1000 Mn polyisobutylene succinic anhydride, about 8.3 equivalents monopentaerythritol, about 8.3 equivalents trimethylolpropane, about 5.8 equivalents adipic acid, and about 0.1 wt % of hypo phosphorous acid. The reaction mixture was heated to about 180° C. for about 2 hours while removing water of reaction. After holding for about 2 hours, the reaction temperature was increased to about 240 to 245° C. and maintained at that temperature while removing water of reaction until the total acid number was less than about 5 mg KOH / g and the kinematic viscosity @100° C. was between about 250 to 400 cSt. (total reaction time is typically 16 to 24 hours).

[0034]To verify the above polymeric polyol ester ...

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Abstract

Polymeric polyol ester additives for metal working applications are described that have lower pour points and improved solubility in API Group II and III basestocks. The polymeric polyol ester contains linear monocarboxylic acid, alkanedioic acid, alk(en)yl substituted succinic acid or anhydride, trihydric alcohol and pentaerythritol.

Description

FIELD OF THE INVENTION[0001]Polymeric polyol ester additives having compatibility with paraffinic mineral oil basestocks (hydrotreated) and usefulness in metalworking applications are described. While these polymeric polyol ester molecules are generally free of phosphorus, sulfur, and other heteroatoms (other than oxygen, carbon, and hydrogen) they can be part of an additive package that includes sulfurized hydrocarbons and phosphorus containing antiwear or extreme pressure additives.BACKGROUND OF THE INVENTION[0002]Metalworking operations include for example, rolling, forging, hot-pressing, blanking, bending, stamping, drawing, cutting, punching, spinning and the like and generally employ a lubricant to facilitate the operation. Lubricants generally improve these operations in that they can provide films of controlled friction or slip between interacting metal surfaces and thereby reduce the overall power required for the operations, and prevent sticking and decrease wear of dies, ...

Claims

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Application Information

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IPC IPC(8): C10L1/14
CPCC08G63/20C10M145/22C10M173/00C10M2203/1006C10M2209/102C10N2220/021C10N2240/407C10N2230/42C10N2230/43C10N2230/70C10N2240/40C10N2240/401C10N2230/06C10N2020/04C10N2030/06C10N2030/42C10N2030/43C10N2030/70C10N2040/20C10N2040/22C10N2040/245
Inventor OLLINGER, CHRISTIAN G.PHILLIPS, DEREK T.KROTO, FRANK L.KALHAN, SANJAY N.
Owner THE LUBRIZOL CORP
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